net.walend.lyophil.memory
Class MemIdentifierSource

java.lang.Object
  |
  +--net.walend.lyophil.memory.MemIdentifierSource

All Implemented Interfaces:

IdentifierSource, java.io.Serializable

public class MemIdentifierSource

extends java.lang.Object

implements IdentifierSource, java.io.Serializable

A long number source that keeps them in memory.

Since:

20001230

Author:

David Walend

Field Summary

private long	counter
private java.lang.Object	guard synchronization guard for the counter.
private static long	LASTID

Fields inherited from interface net.walend.lyophil.IdentifierSource

ROLE

Constructor Summary

MemIdentifierSource()

Method Summary

boolean	checkSetUp() make sure the backing storage is set up correctly
java.io.Serializable	createID() Return a Long unique in the system, which better not be bigger than a single VM.
java.io.Serializable	peekNextID() Returns the next id to be created, without assigning it as in use.
void	setUp() set up the backing storage
void	tearDown() clean up the backing storage

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

guard

private final java.lang.Object guard

synchronization guard for the counter.

counter

private long counter

LASTID

private static final long LASTID

Constructor Detail

MemIdentifierSource

public MemIdentifierSource()

Method Detail

checkSetUp

public boolean checkSetUp()

Description copied from interface: IdentifierSource

make sure the backing storage is set up correctly

Specified by:

checkSetUp in interface IdentifierSource

setUp

public void setUp()

Description copied from interface: IdentifierSource

set up the backing storage

Specified by:

setUp in interface IdentifierSource

tearDown

public void tearDown()

Description copied from interface: IdentifierSource

clean up the backing storage

Specified by:

tearDown in interface IdentifierSource

peekNextID

public java.io.Serializable peekNextID()

Description copied from interface: IdentifierSource

Returns the next id to be created, without assigning it as in use. I use this method for testing.

Specified by:

peekNextID in interface IdentifierSource

createID

public java.io.Serializable createID()

Return a Long unique in the system, which better not be bigger than a single VM.

Specified by:

createID in interface IdentifierSource